Hello Sidimar,
We apologize for the delay and the confusion in understanding your issue. Unfortunately, there is no option in the plugin to do so. There is only one Main image that is displayed in both Thumbnail and the Product page. You cannot have two separate images for both as the Main Image. The additional images that you add are only for the Product page and they are always displayed under the Product Main Image.
That being said, you could try a workaround using the following steps:
1) Create a custom field of type Image by any name(For example ThumbImage).
2) Set it to display in the Thumbnail View while creating the Custom Field.
3) Now for each product – select the image that you want to be displayed in the thumbnail in the ThumbImage Custom Field and leave everything else as it is.
4) If you open the catalogue, you will see two images inside the Thumbnail. Just use the following CSS and enter it in the Custom CSS box in the Selected Catalogue from the List under the Catalogues tab in the plugin Dashboard, to remove the first Image :
.prod-cat-thumb-image-div.upcp-thumb-image-div {
display: none;
}
This way you can upload the Images you want on the thumbnail in the Custom Field that you created and the Main Image in the Main Image- that will show in the Product Page.
Please Note: as we have not tested this, we cannot really comment if it will work or not.
Best regards,